SOURCE_URL=https://github.com/roundcube/roundcubemail/releases/download/1.6.3/roundcubemail-1.6.3.tar.gz.asc SOURCE_SUM=7e6d740999aa1848811fca43a50c24952f3cb5fb452a44146f9c053c06272195 SOURCE_SUM_PRG=sha256sum SOURCE_FORMAT=tar.gz SOURCE_IN_SUBDIR=true